有一种风范叫关爱，有一种姿态叫坚守。地震时，正在玉树孤儿院做义工的香港货柜车司机黄福

Which of the following statements about the internal rate of return (IRR) for a project with the following cash flow pattern is TRUE Year 0: -$ 2000 Year 1: $ 10000 Year 2: -$ 10000（）

A. It has a single IRR of approximately 38 percent.

B. It has a single IRR of approximately 260 percent.

C. It has two IRRs of approximately 38 and 260 percent.

Look, dark clouds are gathering. It is _______ to rain soon.

A．probably

B．possibly

C．likely

D．perhaps

美式期权与欧式期权的主要区别在于( )。

A．交易对象不同

B．交易主体不同

C．履约时间不同

D．履约地点不同

腐蚀是由于材料与环境反应而引起的材料破坏或变质。

途中导游包括：( )

A．重申当日活动安排

B．风光导游

C．介绍游览景点的概括

D．交待次日安排

E．活跃气氛